Internal-combustion motor



J. .CO0K. :NTERNAL coMBusTmN MoToR.

APPLICATION FILED MAY 20, 1920.

'will Patented Jan. 17, 1922.

lill/11111 lill/[fill] A TTORNEYS UNITED STATES PATENT OFFICE.

INTERNAL-COMBUSTION MOTOR.

Specification of Letters Patent.

Patented Jan. 17, 1922.

Application filed May 20, 1920. Serial No. 382,875.

To all whomit may cof/1 oem Be it known that I, JOHN THOMAS COOK, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented a new and Improved Internal-Combustion Motor, of which the following is a full, clear, and exact description.

The present invention relates to new and useful improvements in internal combustion motors, and it pertains more particularly to motors of this character commonly known as of the two-cycle type.

Motors have been constructed on the t-wocycle principle with attendant disadvantages, such, for example, as an improper scavenging of the cylinder or combustion area after 'the tiring of a charge of fuel which provides the power of the motor; the proper supply of combustible fuel" to the cylinder, and the inability to advance and reduce the speed of the motor by controlling the supply of fuel thereto, commonly known as throttling It is one of the objects of the present invention to provide a motor of the two-cycle type in which the cylinder is cleared of burnt gases by introducing the fresh charge thereto under pressure..

It is a further object of the invention to so construct a motor that no valve driving mechanism is employed.

It is a further object of the invention to construct a motor of the twofcycle type, the operation of which will permit of an effective throttling of the fuel supply to vary the volume thereof.

It is a still further object of the invention to provide v a device of this character in which the several parts are easily disassembled as necessity may require.

Referring to the drawings:

Figure 1 is a vertical sectional view of a single cylinder motor of the two-cycle type constructed in accordance with the present invention;

Fig. 2 is a vertical sectional view of a, motor of the two-cycle type constructed upon slightly modied lines.

Referring more specically to the drawings and particularly to Fig. 1, the reference character 5 designates the motor crank case and 6 designates the motor cylinder of which the portion 7 forms the compression area. Mounted within the cylinder 6 in such a manner as to reciprocate longitudinally thereof, is a p-iston 12, and said piston 12 has pivotally secured thereto, as at 8, a connecting rod 9, the lower end of which is pivotally connected as at 10, to the crank shaft `11. v

The cylinder 6 is provided with two inlet yports 13 and 14 arranged on one side thereof in spaced relation to each other, and dialnet rically opposite the inlet port 13 is an eX haust port 15. These ports 13, 14 and 15 are formed in the side wall of the cylinder and are adapted to be opened and closed by the piston in its passage longitudinally of the cylinder. The piston 12 is provided with a projecting skirt or extension 16, and this skirt or extension 16 is adapted to maintain the inlet yports 13 and 14 closed or out of communication with both ends of the cylinderl upon reciprocation of the piston within the cylinder 6, it being understood that the free end o-f the piston opens the upper inlet port 13 to the compression space of the cylinder just as the piston is about to complete its down stroke. This skirt or projection 16 of the piston 12 is provided with a port 17, which is adapted to register with the lower inlet port 14, and establishes communication between the interior of the piston 12 and the upper inlet port 13, through a passage or by* pass 18.

The reference character 2O designates a stationary piston and said stationary piston is provided with lugs or segmental flanges 21, by means of which the piston is maintained in position within the cylinder 6 and the first-mentioned piston 12 by meansV ofA bolts 22, which are also employed to maintain the cylinder in position on the crank case 5. This second-mentioned piston is stationary and is provided with an internal chamber 23. One of the flanges or lugs 21, as the case may be, is provided with a passage 24, and said passage 24 is adapted to communicate on the exterior of the engine with the charge-forming device (not shown) and upon the interior of the engine with a hollow chamber 23 of the stationary piston 20. The top wall 25 of this stationary'piston 2O is provided with a valve opening 26, and seated thereon and adapted to 'form the clo sure thereof, is a valve 27. This valve 27 has a depending stem 28 provided with a collar 29, and said stem is surrounded by means of a spring 30, which engages the top wall 25 of the piston 20 to maintain the valve in closed position. The top wall of the piston 12 is Vprovided on its upper face with a deilector 33, the nurpose of which will be hereinafter described. Y

The operation of this form of the invention is as follows: Y

'Upon the lip-stroke of the piston l2, the charge of combustible fuel is drawn in through the passage 24 to the inner chamber 23 of the stationary piston 20, it being understood that this charge is drawn in by the suction produced by the upward movement of the piston 12, which suction is sufficient to open the valve 27. As the piston 12 continues to move upwardly, the inlet ports 13 and 14 in the cylinder 6 will be closed and upon further up-stroke of the piston 12, the chamber formed between the stationary wall 25 and the headof the piston 12 will be filled with a fresh'cognbustible charge.

After the piston 12 has completed the upstroke and starts downwardly, the valve 27 immediately closes and the charge of gas contained in theV space between the piston 12 and the stationary wall 25, is placed under compression. lVith this combustible charge under compression, immediately the piston 12 clears the port 13, and its port 17 moves to a point where it registers with the inlet `port 14, the charge under compression between the stationary wall 25 andthe piston 12 will immediately pass around through the by-pass 1S against the deflector33 on the upper face of the piston 12. This charge entering under compressiony serves to completely scavenge the cylinder of burnt gases from the previous charge, and upon the next 11p-stroke of the piston the charge 'just ad- Init-ted will be placed under compression and in proper sequence will be fired by any suit-A such as the spark with a passageway 40, and saidpassagewayv 40 has its upper end open as indicated by the reference character 41.' The lower end of this lpassage..way 40communicates with a passageway or by-pass 42 formed eXteriorly of the cylinder 6. In this embodiment of the invention, the explosive charge taken through the valve 27 into the space between the piston 12 and the wall 25 on the stationary piston 20, on the up-stroke of the piston 12, is forced through the passageway 40 and the by-pass 42 to the compression space 7 of the cylinder 6, the upper end of said passageway 42 terminating in a port 44.

F rom the foregoing description, it will be seen that the present invention provides an internal combustion motor in which one or more cylinders may be employed and the vmotor may be constructedrof any of the welleknown types of four-cycle motors with all of the advantages thereof.

Having thus described the inventiolnwhat is claimed is:

1. An internal combustion engine, comprising a stationary piston, cored to produce a fresh gas-chamber, with anv outlet; a cylinder superposed on, spaced from and secured to said piston, having a fresh gas-hypass in communication with said gas outlet but discharging into the cylinder immediately above the stationary piston; and a pistonreciprocating between the cylinder and the stationary piston, compressing a charge between the reciprocating and the stationary pistons, arranged to uncover said discharge when at the limit of an outward stroke and close it shortly thereafter to prevent burnt gas entering' the bypass.

2. An internal combustion engine, comprising a crank case, a stationary piston, and cylinder, both iianged for common attachment to the case, the stationary piston having wrist pin slot, and cored to produce a fresh gas-chamber and passage; a valve in the stationary piston controlling the passage cf gas through the head, a bypass in the. cylinder having anV inlet for the gas after discharge by said valve and an outlet into the cylinder a short space above said head, and a second piston with a wrist pin in the slot, reciprocating between the cylinder and the stationary piston, its head occupying` such short space to uncover said outlet when in the outward position, immediatelyclosing said outlet on making an inward stroke. to prevent the entrance of burnt gas.

JOHN THOMAS oooK. 

